Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1384fd1adb7e687fa252627fa3cda562967671e5754ca63f8b74b49efd9c05ab' 
  AND token = '9eTeVcouXfg5FhHnfTYzYiIUpay+NLmcQ7ZW60jLsAQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}